• 地域ちいき — region / area
• 区域くいき — zone / district
• 領域りょういき — territory / domain
• 聖域せいいき — sanctuary / sacred area
• 区域外くいきがい — outside the area
• 区域内くいきない — within the area

域 combines the radical 土 (earth) with 戍 (phonetic, meaning guard or defense), giving the sense of a defined or protected area. It refers to boundaries, regions, or zones in both physical and abstract contexts.